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AD9665 Output current question

Question asked by Eunki on Nov 14, 2017
Latest reply on Nov 26, 2017 by Eunki

Hi


I used the AD9665 to make a PCB to control the LD, but it seems that the LD does not have enough current to flow, just like the calculations in the datasheet.

 

The LD used 80mW @ 700mA LD.
3 ns ~ 14 ns pulses were input and passed through Attenuator (-13dB) through LD, input to PD, and measured by oscilloscope.
Then the current in the LD is about 400mA, but it is too small and the pulse width is too big.
if there is any improvement method, let me know.

 

I attached a schematic and LD datasheet.

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